I've read some of your other posts. I'm concerned that you sound very anxious to lose weight, you are 18 years old, 5' 8" tall and weigh 150.
What size frame do you have? Check this web site for guidance:
In other posts you say that you've had difficulty losing weight. Could it be that you are actually at a good weight for your frame?
Drinking nothing but shakes could help you lose weight quickly, but you will gain it all back as soon as you return to eating properly. It is not a healthy way to do weight loss. It's best to eat a well balanced diet, just less of it.
Perhaps you should consider an exercise program to help firm up giggly areas more then an extreme diet.
I'm just concerned because at your age is so easy to slip into bad eating habits that can affect you later in life. We've all been there-go on a new fad diet, lose 10-20 pounds, stop and gain 15-25 pounds back, it's viscious circle that the majority of us are trying to break now.
Sarah in MD
49 years old, 5' highest weight-199lbs
. Started SBD Jan 2004, lost 47 pounds in 6 months, then slowly gained it all back.